Allen-Bradley 1756-OV16E ControlLogix Fused Sinking Output Module

Description

The Allen-Bradley 1756-OV16E is a 16-point digital DC output module designed for use within the ControlLogix chassis system. Operating within a 10 to 30V DC range, this sinking current output module provides individual electronic fusing per point to ensure robust circuit protection. It utilizes a Coordinated System Time (CST) Timestamped Fuse Data—Output Data communication format, enabling the module to transmit a Fuse Blown status along with the exact system clock value from the local chassis whenever a fuse blows or resets. This diagnostic capability allows for precise fault tracking and rapid troubleshooting in critical process control applications.

Features

• 16-Point Sinking Outputs: Provides 16 distinct sinking current digital outputs operating between 10...30V DC.
• Per-Point Electronic Fusing: Individual electronic fuse protection across all 16 channels to isolate faults and protect field-side wiring.
• Scheduled Outputs: Offers output synchronization referenced to the Coordinated System Time (CST) with a maximum synchronization variance of 16.7 seconds.
• Configurable Fault States: Each point can be independently configured to hold its last state, turn on, or turn off (default) during a fault condition.
• Program Mode Configuration: Configurable states per point during Program mode, supporting hold last state, on, or off (default).
• Advanced Diagnostics: Returns real-time Fuse Blown status accompanied by local chassis system clock timestamps for both fuse blow and reset events.

Applications

• Solenoide valve control in automated assembly lines.
• Pilot light and indicator panel management.
• Interfacing with DC inputs of secondary control devices or motor drives.
• General-purpose low-side (sinking) switching applications in discrete manufacturing.

Technical Specifications

Installation Guidelines

DIN Rail and Chassis Installation

• Ensure the ControlLogix chassis power supply is switched off before inserting or removing the module.
• Align the circuit board of the module with the top and bottom chassis guides in the designated slot.
• Slide the module into the chassis until the top and bottom locking tabs click into place securely.

Wiring and Polarity

• Verify all field-side power is disconnected before working on the terminal blocks.
• Connect the common positive rail (+V DC) to the field load, and route the return path through the module's sinking output terminals to the negative DC reference.
• Maintain proper separation between low-voltage DC signals and high-voltage AC power lines within the enclosure wire ducts to prevent electromagnetic interference.